15
Size Selection
G1 Air-Purifying Respirator (APR)
US
3
Size Selection
NOTE:
Individuals who wear eyeglasses must use the G1 spectacle kit to guarantee a correct fit. Ordi-
nary eyeglasses cannot be worn under the facepiece.
Regardless of facial dimensions and respirator sizing charts, users must do an actual qualitative or
quantitative respirator fit test to make sure that the correct respirator size is selected.
(1) Do a fit test of the respirator size relative to your facial features and dimensions. Ask the safety
administrator or program manager for help selecting the initial size to try.
(2) Don the respirator. Refer to Section 7 "Donning" for instructions.
(3) Do a negative pressure seal test. Refer to Section 7.3 "Testing the Negative Pressure Seal" for
instructions.
(4) If the respirator does not pass the negative pressure seal test or feels uncomfortable, try the next
nearest size relative to your face.
(5) Passing the negative pressure seal test does not verify that the size is correct. Do a qualitative
or quantitative respirator fit test to verify the size. If the respirator passes a negative pressure
seal test but does NOT pass a respirator fit test, try the next nearest size.
3.1
Respirator Fit Test
WARNING!
Do quantitative or qualitative respirator fit tests routinely for each wearer of this respirator.
Obey all specified warnings and limitations.
Failure to obey these warnings can result in serious personal injury or death.
Refer to ANSI Z88.2 latest version, Practices for Respiratory Protection, and Title 1910.134, Respira-
tory Protection Standard, for information about respirator fit tests.
In addition to regular respirator fit tests, do a qualitative or quantitative respirator fit test after repairs
or maintenance.
NOTE:
The selection of a fit test method can have an effect on the maximum use concentration.
Use the instructions and adapter in a Quik Chek Kit (PN 805078) to do respirator fit testing.
3.1.1 Quantitative Test
For use in a CBRN application, a fit factor of at least 2000, based on ambient aerosol fit test methods
or equivalent, is necessary before any type of respirator is assigned to an individual.
3.1.2 Qualitative Test
Only validated protocols are acceptable. The respirator must pass a test designed to assess a fit factor
of at least 2000.